Consider reducing the default 'best' refractivity spacing to 100 m in troposphere

[Ian Culverwell]

This is Action 01 of ROPP9.0 DRI.

The current default values (see ropp_fm/config/best_fm.nml) are

! --------------------
! Refractivity options
! --------------------

refrac_wanted = .TRUE.,  ! Refractivities desired

geop_min = 200.0,        ! Minimum refrac geopotential (uniformly spaced)
geop_max = 60000.0,      ! Maximum refrac geopotential (uniformly spaced)
n_geop = 300,            ! No. of geopotential levels (uniformly spaced)

These match the defaults in ropp_fm/tools/ropp_bg2ro_1d.f90.

They imply a uniform spacing of 200 m between refractvity geopotential levels. As the title says, we should consider reducing this to 100 m.

[Ian Culverwell]

Won't fix. Since these parameters can now be provided in a namelist, i.e. there is no need to recompile to set different values, then there is no need to change the base code.

[Ian Culverwell]

Closing ticket as won't fix.